• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Reading high V through resistor/cap casings

Carsonmcw

Member
2016-02-01 8:14 pm
I'm working on an old Sovtek Mig 50. It's almost all original and it sounds great now that I've touched up some bad solder joints. While testing around in the amp I noticed on a few filter caps and a few resistors (all within the B+ line) I'm able to read anywhere from 125 to 350 dcv through the side walls of the components. When doing this on a couple resistors it'll make the amp screech horribly. I'm guessing this is a sure sign of faulty/leaky components. Though I'm getting accurate resistances and the B+ is what I would expect with this amp.
Just curious what anyone might know about this.
I can post photos if that is at all helpful.